AE82 4alc issue - one wet spark plug - runs like WRX

[AE101LEV]

I have had this issue with the AE82 for couple months and i have just decided to find out whats up with it

the problem I am having is that it sounds like its dropped a cyl.. it was fine driving one minute then next minute it ran like a dog

now I have purchased a new rotor button and dizzy cap.. i have put new leads on it, changed the ign coil to another 82 coil and im still not having any luck with it..

I checked the plugs and number 1,2 & 4 are dry and kinda sooty (expected) but number 3 is wet, I wipe it off and it looks like oil.
I started the car up with number 3 disconected and it ran exactly the same. reconected number 3 and disconected 1, then 2 then 4 and it still ran the same...

I checked spark on all 4 cyl and I am getting spark on all cyl!

so put all plugs back in, raced the motor and stoped it instantly and pulled number 3 back out and it was still wet, all others were dry.

wot.. the fark... is going on! could the dizzy be farked? or could it be something more severe like a screwed ring.

[Vios-GT_07]

compression test .. will tell you if you've dropped a cylinder..

if the dizzy has sparks on all cylinders then i doubt the dizzy is farked, but i've seen some strange things in my time so don't quote me on that

[AE101LEV]

il do a compression test tonight.. any idea on what pressure I should have for a 320 thou car?

[Darola]

hey there mate....

have u put the wet spark plug into another cyl??? could be a faulty plug

comp should be about 130-150psi

try them out...


also if u are going to get new plugs for it... ask for early v6 prado plugs.. i found they ran great in my old 4a... and alot of other motors ive used them for


hope this helps

Ed

[AE101LEV]

how does 48psi and dropping sound on number 3 ROFL

[hemi twofifteen turbo]

put a tea spoon of oil down the cylinder and compression test again. If you read significanly higher its going to be the rings, otherwise could be stuck valve etc.